Is there a way to have someone fill out an online registration form and also pay at the same time? In other words, if we have someone fill out an online form, we could send them to a page where we list all the products with PayPal buttons. Instead, can we have them choose which program they'd like to register for from a drop down or radio dial and then based on that send them to PayPal and it will register the correct item based on the drop down or radio button?